Spindle-bolster and its support



(No Model.)

' JLRLGRAY.

SPINDLE BOLSTBR AND ITS SUPPORT. No. 306,683. Patented Oct. 14,1884.

UNTTED STATES PATENT Trio-n.

JAMES R. GRAY, OF AYER, ASSIG-NOR TO GEO. DRAPER & SONS, OF HOPE- DALE, MASSACHUSETTS.

SP'INDLE-BOLSTER AND ITS SUPPORT.

.JPECIFICATION forming part of Letters Patent No. 306,683, dated October 14, 188%.

Application filed August 13, 1883. (No model.)

To all whom, it may concern: I

Be it known that I, JAMES R. GRAY, of Ayer, county of Middlesex, State of Massachusetts, have invented an Improvement in Spindle'Bolsters and their Supports, of which the following description, in connection with the accompanying drawings, is a specification, like letters on the drawings representing like parts.

IO This invention is intended as an improvement on that class of spindles and bolsters the lower ends of which are adapted to move or wander laterally to a limited extent under-an unequally balanced load.

1 In this my invention the bolster-case, closed at the bottom to form an oil-well, has sprung into it a split-metal tube, the upper end ot' which constitutes a shoulder or bolster-support for thebolster, which latter, resting thereon with its lower end in the oil in the bolstercase, is free to move laterallyin a radial direc tion as the spindle seeks its true center of rotation. The bolster has co-operating with it a spring-holder, which acts to restrain the bolsler from being rotated with the spindle.

Figure 1, in section, represents a bolstertube, bolsterrail, nut, bolster. bolstersupport, spring-holder, and sleeve-whirl, the latter beingattached to aspindle shown in ele- 0 vation. Fig. 2 is a sectional detail of the bol ster-support, bolster, and spring-holdertherefor, on the dotted line as, Fig. l; and Fig. 3,

a separate view of the bolster-support enlarged and removed.

The spindle A, provided with sleeve-whirl B, bolster-case O, rail 1), and nut E, are all as usual. The case 0, chambered from its upper end, is of usual shape, and may be supplied with oil in any usual manner.

0 My improved bolster-support is made as a sheet-metal tube, f, open along oneside, as at f, and normally the diameter of the said support externally is in excess of the internal diameter of the bolster-case, so that when the 5 said bolster-support is contracted and sprung into the bolster-ease, as shown in Figs. 1 and 2, it will be held thereon so firmly by its own pressure against the bolster-case as not torotate but remain in fixed position, andits upper end, as at f, is made to come just oppowith the case. its lower end, is slotted, as shown at n, and 1s bolster-support, as shown in Fig. 2.

site the line of the band-pull. The bolster 9, having a cylindrical head, 9, of less diameter externally than the internal diameter of the bolster-case, is turned away or reduced in diameter to form a shoulder, the under side 5 5 of which rests upon the upper end, f, of the bolster-support, f, as shown in Fig. 1. The external diameter of the head of the bolster is enough smaller than the internal diameter of the loolstercase to afford a space in which the bolster may move laterally as the spindle seeks its truecenter of rotation, the shoulder g at such time moving on the upper end of the said support. The bolster reduced in diameter belowthe shoulder and placed loosely within the bolster-case, has its lower portion closedto form a foot-step for the spindle. The foot of the bolster, or that part of it below the support 011 which the bolster moves, is considerably smaller in diameter than the diam- 7o eter of the interior of the bolster-case, so that the film of oil between the said foot and the bolster-case will act as a cushion or packing,

so that the said part need not eomein contact The bolster, having a step at restrained from rotation with the revolving spindle by means of the spring or yielding holder on, composed of a short piece of steel, which is dropped loosely within the bolstercase and the bolster-support, one end of the said holder entering the slot f in the said The forked lower end of the bolster straddles the spring-holder, and when the spindle is being rotated the projections 0 0, acting against the same, restrain the bolster from rotation in the bolster-case; yet the bolster and the spindle within it are free to move laterally to a limite .l extent in the bolster-case for the purposes 9 stated. As the spindle is started, the springholder yields to and gradually arrests the notched bolster.

The bolster rests on the bolster-support substantial] y opposite the line of the band-pull, to prevent the strain on the banddrawing the spindle over out of vertical position.

- The bolster will be drilled throughor grooved in suitable or usual manner for the circulation and flow of oil.

By making the holster-support as a separate tube the cost of making 11 shoulder therein, as in my application No. 71,744, is obviated.

I claim 1. The bolster-ease and the si'ilitsleeve-like removable b0]StCD-SHPPOI'BSpll'l11g therein, and the shouldered bolster uda 'ited to rest thereon, combined with ihe bolster-holder to operate substantially as described.

2. The bolster euse closed at its bottom. to form an oil-well, the shouldered bolster slotted at its lower end,a.nd the independent splittube like removable support 1'', sprung therein for the bolster, combined with u holder for the i b0lster,to prevent it from being rotated inthe bolster-ezise the said holder entering a slot in lhebolster, substantially as described.

2;. The spindle provided with it sleevewhirl, the lJOlStUbCEIHU, the shoulderedbolster, notched at its lower end, and the independent removable split-tube-like support for the bolster, sprung into the lJUlSliCPOZlSG, and huving its upper end opposite the line of the bend pull or the groove of the whirl combined with at holder to restrain the bolster from rotation with the spindle, substantially as set to rth.

In testimony whereof Ihuve signed inynume to ihisspeeilieation in ihepresenee of two subscribing witnesses.

- JAMES 1t. GRAY.

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